Hi, > * I don't think it's possible to control where clients go for reads - > Ceph is pretty much optimized to the case where all nodes are in a > single datacenter, over a more or less homogeneous network.
So, what piece(s) of code decides which replica is read from? Note that even in the single-datacenter case, I'd want to avoid crossing rack boundaries if my client is in the same rack as one of the possible OSDs. > For writes, > though, you'd be stuck with WAN speeds no matter what, because the data > has to go out to all replicas before the writes complete. Hmm. Too bad; I'd be more than happy with writing to one or two replicas, and trusting CEPH to manage the rest of the copying in the background. -- -- Matthias Urlichs -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
